Thanks! Im glad to know someone learns something from my videos. I only want to share my experiences and encourage other rc guys to improve their cars and enjoy the hobby.
I like it ! Perfect combo with the other video you made with brush stock motor tests! Excellent to make some math's and choose the brushless motor for the speed we want. Bravo !
I just talked to Castle. Please rerun this test with a fresh 10th scale 5000 mah battery. They think that battery was to small for the 9000kv motor. Esc was ok. Also: your note at the end of the video was Castles same thought.(I had to pause to fully read it)
Kyle Teal Thanks for watching and your comment ... and yes I would like to do your recommendation to do another test but for now I dont have a 5000 mAh battery. Im sure the 9000 kv Castle motor will perform much better with a larger 2s battery since it can draw more amps to take advantage of the high kv motor. Based on my experience, high kv motors need lipo batteries with higher amp capacity and also a high discharge rate ( C- rating) .
so the 7700 and the 9000kv motor is best for speed runs i take it? but it looks as if 2s can get you roughly the same speed using a 3s battery! trying to figure this out, so with the right gearing and higher c rating battery you can achieve the same speed!
No, they are not always the best for speed runs 😆... because you can also use lower KV motors depending on your gear ratio. It is true that you will get the same speed by using higher lipo voltage or adjusting the gears since there are many ways to achieve more speed... but if you do Not want to use another lipo battery with more cells nor change the gearing, then simply changing to a motor with slightly higher kv will increase your top speed ,. but the only downside is more possibility of overheating your motor & ESC. Thanks for watching 👍
Hi you did not place a voltmeter on the batt when you did your runs, a 2S Lipo will be around a volt higher than 7.4 so your RPM levels are correct, not better than normal. 1 volt extra = 3900rpm extra difference on your first run which is kind of important
This is just a simple and quick test to see the approx. RPMs we can get from those motors. I started with the lowest KV motors because the lipo voltage will drop afterwards.
Such a informative but simple video. I like your style.. straight facts. Keep up the great work my friend. Learning a lot from you 💪
Thanks! Im glad to know someone learns something from my videos. I only want to share my experiences and encourage other rc guys to improve their cars and enjoy the hobby.
I like it ! Perfect combo with the other video you made with brush stock motor tests! Excellent to make some math's and choose the brushless motor for the speed we want. Bravo !
Thank you very much!
Very good test bro 👍
Thanks bro!
good test! 👍
Thanks! 👍
Goog💪💪👍👍
thanks for watching
Can those Castle motors handle 2S battery only? Thank you in advance
yes, those motors are for 2s lipo
I just talked to Castle. Please rerun this test with a fresh 10th scale 5000 mah battery. They think that battery was to small for the 9000kv motor. Esc was ok.
Also: your note at the end of the video was Castles same thought.(I had to pause to fully read it)
Kyle Teal Thanks for watching and your comment ... and yes I would like to do your recommendation to do another test but for now I dont have a 5000 mAh battery. Im sure the 9000 kv Castle motor will perform much better with a larger 2s battery since it can draw more amps to take advantage of the high kv motor. Based on my experience, high kv motors need lipo batteries with higher amp capacity and also a high discharge rate ( C- rating) .
@@RcModwerks23 yeah your right I run Max Amps 6500 60c for race batteries. At $260 a battery at the time i only have 2.
@@kyleteal5888 That´s a huge battery, what scale is your rc car? My rc cars are 1/14 & 1/18 scale that is why I use smaller size batteries.
@@RcModwerks23 7.4v 2 cell I run them on 10th scale short course, stadium truck, touring car 200mm and crawler
@@kyleteal5888 nice, you can easily put larger lipos in the 1/10th scale rc cars
so the 7700 and the 9000kv motor is best for speed runs i take it? but it looks as if 2s can get you roughly the same speed using a 3s battery! trying to figure this out, so with the right gearing and higher c rating battery you can achieve the same speed!
No, they are not always the best for speed runs 😆... because you can also use lower KV motors depending on your gear ratio.
It is true that you will get the same speed by using higher lipo voltage or adjusting the gears since there are many ways to achieve more speed... but if you do Not want to use another lipo battery with more cells nor change the gearing, then simply changing to a motor with slightly higher kv will increase your top speed ,. but the only downside is more possibility of overheating your motor & ESC. Thanks for watching 👍
Hey bro, will this 9k kv motor brun Down in wltoys a959b? Is it too much for that?
It depends on how you intend to run your A959, is it for speed run or bashing only? Better get a lower kv for bashing
Hi you did not place a voltmeter on the batt when you did your runs, a 2S Lipo will be around a volt higher than 7.4 so your RPM levels are correct, not better than normal. 1 volt extra = 3900rpm extra difference on your first run which is kind of important
This is just a simple and quick test to see the approx. RPMs we can get from those motors. I started with the lowest KV motors because the lipo voltage will drop afterwards.
@@RcModwerks23 How much no-load current do these small motors draw?
great video & teachings. if you don't mind, can you please tell me the brand/model # of the RPM testing instrument device? thank you & be safe.
please check this link: bit.ly/37RLIdt
Can they handle 3s easy?
both the 3900 kv & 4550 kv can handle 3s safely ... but it will be risky with the other motors with very high kv rating
Today i got new 3650 3900kv motor. ,I can feel the heat generated in 3cell without any load. ,Is that usual
I only ran that motor with 2s at the moment, and it never get hot even at fulll speed. Will try 3s later on.
The higher the KV the smallest pinion you have to use
Generally yes, and the pinion/spur sizes you use will depend on what you want to achieve with your rc car build
How to price uncle
These brushless motors cost between 20-50 Euros each
brushless dc motor for rc boat
not sure if these motors are also good for rc boat
Put 9000 kv motor into 144001 on 2 s ofc
That would be nice 2s setup for speed runs
@@RcModwerks23 that would fly
@@fran.6496 I will try that setup later, after I´m done with my current setup on my 144001